Scrapy返回0个项目和0个已爬网页面

如何解决Scrapy返回0个项目和0个已爬网页面

请给我帮助。我正在学习抓取功能，并且一直在努力使其能够抓取网站。

我每次都抓取0个项目。我已经使用过user_agent并还在settings.py中设置robot_txt = False，但是它不起作用。

我注意到当我使用scrapy shell时，我得到了所有详细信息，并一次又一次地检查我的代码以发现错误，但仍然找不到。请有人应帮助我检查并告诉我哪里错了。 蜘蛛码：

    import scrapy
    from scrapy.linkextractors import LinkExtractor
    from scrapy.spiders import CrawlSpider,Rule
    from scrapy.loader import ItemLoader
    from  batt_data.items import BattDataItem
    import urllib.parse
    
    class BatterySpider(CrawlSpider):
        name = 'battery' 
        allowed_domains = ['web']
        start_urls = ['https://www.made-in-china.com/multi- 
        search/24v%2Bbattery/F1/1.html']
        base_url = ['https://www.made-in-china.com/multi- 
        search/24v%2Bbattery/F1/1.html']
    
        rules = (
            Rule(LinkExtractor(restrict_xpaths='//*[contains(@class,"nextpage")]'),callback='parse_item',follow=True),)
    
        def parse_item(self,response):
            item = BattDataItem()
            item['description'] = response.xpath('//img[@class="J-firstLazyload"]/@alt').extract()
            item['chemistry'] = response.xpath('//li[@class="J-faketitle ellipsis"][1]/span/text()').extract()
            item['applications'] = response.xpath('//li[@class="J-faketitle ellipsis"][2]/span/text()').extract()
            item['shape'] = response.xpath('//li[@class="J-faketitle ellipsis"][4]/span/text()').extract()
            item['discharge_rate'] = response.xpath('//li[@class="J-faketitle ellipsis"][5]/span/text()').extract()
            yield item

日志文件：

C:\Users\Ikeen\batt_data>scrapy crawl battery
    2020-08-29 21:17:27 [scrapy.utils.log] INFO: Scrapy 2.1.0 started (bot: batt_data)
    2020-08-29 21:17:27 [scrapy.utils.log] INFO: Versions: lxml 4.1.0.0,libxml2 2.9.4,cssselect 1.1.0,parsel 1.6.0,w3lib 1.22.0,Twisted 20.3.0,Python 3.6.3 |Anaconda,Inc.| (default,Oct 15 2017,03:27:45) [MSC v.1900 64 bit (AMD64)],pyOpenSSL 17.2.0 (OpenSSL 1.0.2l  25 May 2017),cryptography 2.0.3,Platform Windows-10-10.0.18362-SP0
    2020-08-29 21:17:27 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor
    2020-08-29 21:17:27 [scrapy.crawler] INFO: Overridden settings:
    {'BOT_NAME': 'batt_data','NEWSPIDER_MODULE': 'batt_data.spiders','SPIDER_MODULES': ['batt_data.spiders'],'USER_AGENT': 'Mozilla/5.0'}
    2020-08-29 21:17:27 [scrapy.extensions.telnet] INFO: Telnet Password: 549b17173b135b6b
    2020-08-29 21:17:27 [scrapy.middleware] INFO: Enabled extensions:
    ['scrapy.extensions.corestats.CoreStats','scrapy.extensions.telnet.TelnetConsole','scrapy.extensions.logstats.LogStats']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled downloader middlewares:
    ['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware','scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware','scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware','scrapy.downloadermiddlewares.useragent.UserAgentMiddleware','scrapy.downloadermiddlewares.retry.RetryMiddleware','scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware','scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware','scrapy.downloadermiddlewares.redirect.RedirectMiddleware','scrapy.downloadermiddlewares.cookies.CookiesMiddleware','scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware','scrapy.downloadermiddlewares.stats.DownloaderStats']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled spider middlewares:
    ['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware','scrapy.spidermiddlewares.offsite.OffsiteMiddleware','scrapy.spidermiddlewares.referer.RefererMiddleware','scrapy.spidermiddlewares.urllength.UrlLengthMiddleware','scrapy.spidermiddlewares.depth.DepthMiddleware']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled item pipelines:
    []
    2020-08-29 21:17:28 [scrapy.core.engine] INFO: Spider opened
    2020-08-29 21:17:28 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min)
    2020-08-29 21:17:28 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
    2020-08-29 21:17:30 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/1.html> (referer: None)
    2020-08-29 21:17:30 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'www.made-in-china.com': <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/2.html;jsessionid=2B77F23449911847145999CD6E9B6429>
    2020-08-29 21:17:30 [scrapy.core.engine] INFO: Closing spider (finished)
    2020-08-29 21:17:30 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
    {'downloader/request_bytes': 234,'downloader/request_count': 1,'downloader/request_method_count/GET': 1,'downloader/response_bytes': 54381,'downloader/response_count': 1,'downloader/response_status_count/200': 1,'elapsed_time_seconds': 2.42789,'finish_reason': 'finished','finish_time': datetime.datetime(2020,8,29,20,17,30,804912),'log_count/DEBUG': 2,'log_count/INFO': 10,'offsite/domains': 1,'offsite/filtered': 1,'request_depth_max': 1,'response_received_count': 1,'scheduler/dequeued': 1,'scheduler/dequeued/memory': 1,'scheduler/enqueued': 1,'scheduler/enqueued/memory': 1,'start_time': datetime.datetime(2020,28,377022)}
    2020-08-29 21:17:30 [scrapy.core.engine] INFO: Spider closed (finished)

解决方法

2020-08-29 21:17:30 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'www.made-in-china.com': <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/2.html;jsessionid=2B77F23449911847145999CD6E9B6429>

您的请求不属于您定义的允许域，因此已被过滤。

    allowed_domains = ['web']

使用allowed_domains = ['made-in-china.com']或将其完全删除。